Universal clock



(No Model.)

A. M. CORY.

UNIVERSAL CLOCK.

No. 301,215. Patentd July 1, 1884 I INVfgTOR: J Y I W ATTORNEYS.

ijNi'irnii Starts PATENT rrrcij.

ABRAHAM MORRELL CORY, OF NEW PROVIDENCE, NElV JERSEY.

UNlVERSAL CLOCK.

SIECIFIC ZION forming part of Letters Patent No. 301,215, dated July 1,1884.,

A pplication filed August 26, 1882. (No model.)

1O vision of such degree with only a single clockmovement.

The invention consists in a universal clock formed of a rotatingdial-annulus divided into subdivisions of time, and surrounded by a I 5fixed ring divided into degrees, whereby the time on each and everymeridian will be shown at the same time, and if the correct time on onemeridian is given the time at any other meridian can be obtained withoutcalculations by simply observing the hour and minute opposite thedesired degree.

The invention further consists in the combination, with the above clock,of a minutehand for indicating minutes and fractions thereof.

The invention also consists in additional disks mounted on shafts insuch a manner as to correspond with certain degrees, on which disks thenames of places are printed which 0 are on the same degree with whichthese said disks correspond in position.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicate cor-3 5 responding parts in all the figures.

Figure l is a plan view of a watch provided with my universal time-dial,which is arranged for ninety degrees. Fig. 2 is a plan View of aclock-dial with my improvement arranged for one hundred and eightydegrees; and Figs. 3

' and 4. are modifications in which the dial is stationary, and thelongitudinal ring and the disk 13, with subdivisions on it, are movable.

The dial A of the clock consists of a central 5 fixed disk, B, and arotating annulus, (3, surrounding the disk 13, which annulus G issurrounded by a fixed ring, D. The ring D is provided with twoconcentric circles or double-circular lines, E and F, whichare dividedinto sections of fifteen degrees, each section being subdivided intogroups of degrees,

into single degrees, or into fractions of degrees, as may be desired. Inthe case shown the rings are divided into divisions a of fifteen degreeseach, and these sections are divided into single degrees. Thesubdivisions of the outer circle Eare marked with numerals from left toright, and the subdivisions of the circle F are marked with numeralsfrom right to left, the zeros of the two rings correspondin The rotaryannulus G is divided into twelve equal parts, each part representing onehour, and each one may be divided into sixty minutes, and, if desired,into fractions of minutes. The fixed central disk, D, has its peripherydivided into four equal parts, each representing one minute, and eachone divided into sixty seconds or into fractions of seconds. The annulusO is connected with theclock-work below the dial in such a manner thatthis ring rotates once in twelve hours, and a second hand, G, isconnected with the central arbor of the clock-work in such a manner thatit rotates once in four minutes. The initials of cities east ofGreenwich are written, printed, or otherwise produced on the ring Dadjoining to the graduated circle E, and the names of cities west fromGreenwich are arranged adjoining the graduated circle F of the ring D.In the case shown the initials of the'names of cities east of Greenwichare arranged around the inner edge of the circle E, and the names of thecities west of Greenwich are arranged around the circle F; and, ifdesired, the names of the cities west of Greenwich can be written,printed, or otherwise produced adjoining to the inner circle, F,hereinafter more fully described.

A hand, H, may be mounted on an arbor of the works above the centraldisk, B, in such a manner that it will revolve once in twentyfour hours.To this hand a semicircle, J, of card-board or other suitable material,is attached, and the disk B is provided with a circle, K, consisting oftwo semicircles, each divided into one hundred and eighty degrees.

As shown, the clock indicates twelve o clock at London or Greenwich. Ifthe time in New York is desired, the initials of New York are found onthe ring D, and that timc-mark on the ring 0 which registers with themark denoting the longitude of New York denotes the time at New York,and it will be seen that it is seven ocloek or a few minutes past sevenat New York. In St. Johns the time will be found to be 8.86, in Halifax7A8, and so on. As these cities are west from Greenwich, their time willbe so much slower than that of London. If the time of Berlin (expressedin the drawings by Bn on the ring E to the right of the zero) isdesired, it will be found to be about 12.48. At Teheran, in Persia,(expressed in the drawings by T n on the ring 13,) when it is twelveoeloek in London, it will be 3.24, and so on. The time of any city onthe globe may be found, provided the longitude of the city is known. Itmay frequently happen that so many cities are on the same meridian thatall of their names cannot be printed on the ring D. For that reason Ihave provided a series of disks, N, mounted on suitable shafts in such amanner that each disk will correspond with a degree on the divisions ofthe circles E and F. The names of a number of cities can be printed,stamped, or otherwise produced on the edges of these disks N, all thenames printed on the same disk having the same longitude. The disk caneasily be turned until the desired name appears uppermost.

It may happen that the time and longitude marks on the annulus (J andring D may not register when the time orlongitude is required in a givenplace. In such event the angle of their separation is indicated by thefractional numbers on the disk D, a complete rotation being effectedduring the interval elapsing between the registering of the marks ontherings O and D, the fractional time or longitude for any given placewhen the marks do not register being indicated by the numbers on thedisk 3, pointed out by the hand G, or by the rotation of the disk 13.

If desired, the subdivisions of the annulus 0 may be made equal to tenminutes, and one rotation of the hand G or a rotation of the disk 13equal to ten minutes; butsuehmodifications do not affect the invention,as in all cases the time required by the hand G to make one revolutionshould be equal to the unit on the annulus C. An inner circle, F, ofdivisions of longitude is provided on the inner circumferenee of thering 1), corresponding with the cireles of longitude IE and F, thepurpose of which is to facilitate the finding of the time-mark on theannulus 0 corresponding with the longitude-mark of the place for whichthe time is sought. he hand II always points to the meridian upon whichthe sun is, or to the degree of longitude where it is midday, and thesemidisk J is turned toward the dark or shaded half of the earth.

In place of dividing the rotating annulus (3 into twelve hours andhaving it rotate once in twelve hours, it may be divided intotwenty-four hours and rotate once in twentyfour hours. In that case onlyone ring, E or F, will be required, and that must be divided into threehundred and sixty degrees.

In Fig. 1 the ring D is divided into ninety spaces of four degrees each,representing degrees of longitude, and as here shown indicates by itsdivisions the time for all points on any given quadrant of the globe. Another ring, representing another quadrant, may be substituted for thering D, said ring having other numbers and other localities, ordesignating characters upon it for any other quadrant of the earth. Forinstance, in Fi 1 the time is shown at points between St. Johns and NewArchangel. A ring substituted for this might show the time for all.places in a quadrant of ninety degrees, beginning at any meridian oflongitude and at a different latitude.

In Fig. l I have divided the annular dial 0 into six hour spaces only. Imust have two numerals at each division to make up the number 12. Thusopposite the several divisions successively are marked 11. 7, 2 t5, 3 9,i 10, 5 11, 6 12. If the dial-ring Gshould be divided into four spacesonly, there would have to be three numerals at each division ,d e. otherwise the clock or watch shown in Fig. 1 operates in the same manner asthe clock shown in Fig. 2.

I have described these numerous modifications and changes of myinvention to show that the principle of the same is not changed.

In all cases I have a ring divided into degrees.

Further, I have a rotating annulus divided into hours,and I have aminute-hand for indicating minutes and fractions of minutes. The modi'fieations only affect the construction, and the details of these changesdepend, chiefly, upon the size of the clock. For instance, in alargepermanent clock in an observatory, I would divide the outer circles, Itand F, into three hundred and sixty degrees, and would divide thedial-annulus G into twenty-four hours, and I would also provide thedisks N. For a watch I would not make the dial any larger than thatshown in Fig. 1, and would leave off all parts that could be omittedwithout al fecting the working of the same.

' The above-described mechanisms may be combined with a clock whichindicates the standard time at the place at which the clock is located.

Without departing from the idea of my invention the time subdivisionsmay be arranged on the outer or stationary ring, and the me ridiansubdivisions on the revolving disks.

Having thus described my invention, I claim as new and desire to secureby Letters Iatentl. The combination, with a revolving dial provided withdivisions of time, of a longitude-ring concentric with said dial, anddivided into degrees or fractions of degrees, substantially asdescribed, whereby it the time and longitude on one meridian are knownthe times and longitudes at all. other meridians will also be indicated,as set forth.

2. In a universal clock, the combination, with a revolving annular dial,of a fixed. ring ICO concentric with it and divided into degrees, and ofa revolving minute-hand, substantially as herein shown and described,and for the purpose set forth.

3. In auniversal clock, the combination, with the rotating annular dial0, of the ring D, concentric with it and divided into degrees,

.of the hand G, and of the central disk, B,within the ring G,substantially as herein shown and described, and for the purpose setforth.

4. In a universal clock, the combination, with the annular dial 0,divided into hours and minutes, of the ring D, surrounding it anddivided into degrees, the hand G, and the hand I-I, provided with asemi-disk, J, substantially as herein shown and described, and for thepurpose set forth.

5. In a universal clock, the combination, with the revolving annulardial 0, divided into hours and minutes, of the fixed ring D,

divided into degrees, and a series of disks, N,

mounted outside of the ring D, which correspond with the subdivisions ofthe same for the names of towns or places printed or otherwise producedon the edges, which towns or places are located on the meridian withwhich the disk corresponds, substantially as herein shown and described,and for the purpose set forth.

6. The combination, with a revolving dial provided with divisions oftime, and a longitude-ring concentric with said dial, and divided intodegrees or fractions of degrees, of two or more hour-indicating numeralsarranged on each hour-division on the dial, substantially. as described,and for the purpose set forth.

ABRAHAM MORRELL CORY.

\Vitnesses:

OSCAR F. GUNZ, G. SEDGwIcK.

